TY  - BOOK
AU  - Verschuur,Gerrit L.
TI  - Impact!: the threat of comets and asteroids 
SN  - 0195101057 (cloth : alk. paper)
AV  - QB721 .V48 1996
U1  - 551.3/97 20
PY  - 1996///
CY  - New York
PB  - Oxford University Press
KW  - Comets
KW  - Asteroids
KW  - Impact
KW  - Evolution (Biology)
KW  - Earth
N1  - Includes bibliographical references (p. [223]-226) and indexes
UR  - http://www.loc.gov/catdir/enhancements/fy0635/95045030-d.html
UR  - http://www.loc.gov/catdir/enhancements/fy0723/95045030-b.html
ER  -